Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b4791f95f6be00…

MALICIOUS

PDF

46.7 KB Created: 2020-08-29 07:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43a7038a1c8400deb00d91c7c3a006b7 SHA-1: 6b5bad9e5ceff6e71a31aea5e59c5f74ce567ed7 SHA-256: 69b4791f95f6be002652f226786d01b122afb0fe00e6dfa3b78dd48fe387305f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.club/wix. The document body, though heavily garbled, contains the same URL and a reference to a German phrase, likely intended as a lure. No scripts were extracted, but the presence of numerous links and the redirector heuristic strongly indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/wix?keyword=M%25C3%25A4dchen+mit+Tennisschl%25C3%25A4ger
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/dojedilur.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/binegazifuzoxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/25323110792.pdf
    • https://static.usrfiles.com/ugd/b8c837_88f1222e65b64af7a3ea06dd4e3211cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc4ab14617c14f5c97f5d358f46dbd76.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e801cfe74ae4804bee56ed40a5a27b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_50013010c18e477f8e551885bd23c3ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_aabcc7ab164b4acaa7215e490d6c237b.pdf
    • https://static.usrfiles.com/ugd/b8c837_1dc06b8a4d1e49f2aa0a95c7f6ebf558.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea8f9bafac8d4216ac3cc7048b98a996.pdf
    • https://static.usrfiles.com/ugd/b8c837_a80824a325b64bb391327b8d01d02783.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5adc04bb8e148e19018b756e5eab315.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/flannelette_sheets_super_king_size.pdf
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/grow_bible_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/69773854552.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1415/files/sarah_mclaughlin_good_enough.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000680a.bin
5e7786b740c0e1633ceed18d656c21efacc75fcb562008e22741a6c15e9af547		 pdf-font-stream PDF embedded font (sfnt) at offset 0x680A 5104 bytes
font_01_sfnt_off0000792c.bin
4a8cc888cd7ee0a5d4177b381f858ac5896e8a601e1eb46ec3332dba1c579cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x792C 11200 bytes
font_02_sfnt_off00009df9.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF9 4324 bytes

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